ISSUER PROFILE · CIK 0001297184
Amphastar Pharmaceuticals IncAMPH
1 13D/G filings
1 distinct filers
2 insider transactions (365d)
Cross-Reference Snapshot
Activist filings
1
1 SCHEDULE 13G
Distinct filers
1
single filer
Insiders (365d)
2
2 buys · 0 sales
Latest short DTC
5.24
as of 2026-06-30
13D/G Filings Timeline · 1 total
Form 4 Insider Transactions · last 365d
| Date | Insider | Role | Type | Shares | Price | Value |
|---|
| 2026-07-09 |
Pierce Anthony T |
director |
Award |
7,886 |
— |
— |
| 2026-07-09 |
Pierce Anthony T |
director |
Award |
16,646 |
$19.02 |
$317K |
FINRA Short Interest History
| Settlement | Short Interest | Days to Cover | % Δ vs prior |
|---|
| 2026-06-30 |
3,845,576 |
5.24 |
+1.2% |
| 2026-06-15 |
3,799,584 |
7.13 |
+1.4% |
| 2026-05-29 |
3,747,543 |
4.73 |
-0.9% |
| 2026-05-15 |
3,779,877 |
4.71 |
+5.4% |
| 2026-04-30 |
3,585,957 |
8.71 |
-8.1% |
| 2026-04-15 |
3,903,290 |
8.63 |
+10.7% |
| 2026-03-31 |
3,527,477 |
6.70 |
-5.6% |
| 2026-03-13 |
3,738,333 |
5.15 |
+2.2% |
| 2026-02-27 |
3,658,291 |
6.13 |
-1.6% |
| 2026-02-13 |
3,719,566 |
11.17 |
-3.2% |
| 2026-01-30 |
3,843,799 |
14.99 |
+1.1% |
| 2026-01-15 |
3,803,135 |
9.91 |
-7.2% |
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